Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/GCPWORKS">GCPWORKS</a><hr>
<H3>Mosaic Area Collection</H3>
The ``Mosaic Area Collection'' panel is used to create, edit, save, and
load mosaic cut line vectors. The panel is launched by selecting the
``Select Mosaic Area'' step on the main control panel.<p>
The mosaic cut line vector outlines the area of the uncorrected image
to be registered (during pre- and final registration). If
no cut line is selected, the entire uncorrected image is registered.<p>
The mosaic cut line vector can be collected in either the
uncorrected or the georeferenced image window; however, once
collection and editing has started in one window, it must all be done
there. The mosaic cut line will be transformed according to the
current GCP Model so that the cut line is displayed in both the
uncorrected windows and the georeferenced windows. The transformed,
or uncorrected cut line will be updated each time the model is changed.<p>
Briefly, cut line vertex coordinates can be modified by clicking and
dragging the left mouse button in the image window. Cut line vertices
can be modified and accepted by clicking and dragging the right
mouse button.<p>
The ``Mosaic Area Collection'' panel contains a ``Vertex Editing'' area for
operating on the current vertex.  The vertex number field, and X
coordinate and Y coordinate fields are editable. The action
buttons perform the following functions:
<P>
<UL>
<LI> Add: Toggles into and out of Add mode. Add mode allows entry of
new vertices at the end of the vertices list.  Specifically, 
click and drag the left mouse button, and release when the 
cursor reaches the desired location; a new vertex is then
accepted.  Continue until the desired number of vertices is
added. Click on the Add button again to terminate the Add
operation.
</UL>
<UL>
<LI> Insert: Adds a new vertex in the list, directly behind the active 
vertex.
The active vertex is indicated by a box around the image window
and is highlighted in the vertex scroll list. The active
vertex is either the last added vertex, or the closest vertex
to the image cursor when no operation (such as Add or Move)
is active.
</UL>
<UL>
<LI> Delete: Deletes the active vertex; the next vertex in the list
of vertices becomes the active vertex.
</UL>
<UL>
<LI> Move: Toggles into and out of Move mode. Move mode allows movement
of the active vertex to the desired location.  Specifically, 
click and drag the left mouse button, and release when the
cursor reaches the desired location of the vertex. Click on
the Move button again to burn in the active vertex to the
location of the cursor, and to terminate the Move operation.
</UL>
<UL>
<LI> New: Deletes all the current points.
</UL>
<UL>
<LI> Finish: Closes the outline to form a polygon.
</UL>
The bottom of the panel holds the ``Accepted Vertices'' area, which is
a scrollable list of the vertices in the current cut line. If one is
selected, that vertex will become the new edited vertex.<p>
The Mosaic Area Collection panel contains a pulldown ``File'' menu
with options for saving and loading cut lines. When saving, it must
be established whether the vectors are being saved in uncorrected image
pixel/line coordinates (Save Uncorrected Vectors) or in georeferenced 
coordinates (Save Uncorrected Vectors).  When loading, it is necessary to
establish which window the vectors are to be edited.  They can either
be edited in the uncorrected windows (Load Uncorrected Vectors), or in the
georeferenced windows (Load Georeferenced Vectors).
<P>
<hr>
Parent Topic: <A href="http://www.pcigeomatics.com/cgi-bin/pcihlp/GCPWORKS">GCPWORKS</a><br>
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